TW201344015A - Reinforcement assembly, reinforced concrete structure, reinforcing bars and shear reinforcing bars - Google Patents

Abstract

The present invention provides a reinforced concrete structure that ensures a sufficient thickness of a concrete protection layer. A wall constructed with a reinforced concrete structure comprises a pair of flat concrete surfaces 42a, 42b that extend in a planar form and are parallel to each other. A reinforcement assembly 43 that is arranged on a plane parallel to the pair of concrete surfaces 42a, 42b comprises a plurality of first bars 10E and a plurality of second bars 10F that are perpendicular to each other. The first bars 10E and the second bars 10F comprise reinforcing bars having a flat cross-section and having a minor axis that is perpendicular to the concrete surfaces 42a, 42b.

Description

Reinforced concrete combination, reinforced concrete structure, steel bar and shear reinforcement

The present invention relates to a reinforcing bar assembly and a reinforcing bar used in a reinforced concrete structure such as a column, a beam, a wall, a ceiling, a floor, a foundation, and the like.

The reinforced concrete structural system is constructed by embedding a reinforcing bar assembly in the concrete. A reinforced concrete structure such as a column or a beam is taken as an example for description. As disclosed in the patent document 1 (Japanese Patent Laid-Open No. Hei 8-42064), the reinforcing bar assembly includes a plurality of main ribs which are parallel to each other and linearly extended; and a circular or spiral shearing auxiliary The strong ribs are disposed at intervals in the longitudinal direction of the main ribs and are disposed to surround the main ribs. The concrete surface surrounds the reinforcement assembly across the entire circumference.

The reinforcing bars used in the main ribs or the shear reinforcing ribs of the above-mentioned reinforcing steel combination are formed on the outer periphery of the base having a substantially circular cross section to form ribs for improving adhesion to concrete.

In the above reinforced concrete structure, the thickness of the concrete protective layer is strictly required to be a predetermined value or more in accordance with the building standard. The thickness of the protective layer corresponds to the distance between the concrete face and the portion of the steel bar assembly closest to the concrete face.

In the case of a long concrete structure such as a column or a beam, the shearing auxiliary reinforcing rib is disposed on the outermost side of the reinforcing steel assembly, and the distance between the outer circumference of the shearing auxiliary reinforcing rib and the concrete surface becomes The thickness of the protective layer of concrete.

Since the thickness of the protective layer above the specified value is strictly required as described above, the sectional area of the concrete is reduced, or the main rib is outwardly oriented (from the central axis of the reinforced concrete structure) There is a constraint in increasing the strength of the reinforced concrete structure by shifting away from it.

In order to ensure the thickness of the above protective layer and to reduce the sectional area of the concrete or the deviation of the main rib outward, there is no other way than to reduce the diameter of the reinforced reinforcing rib, thus causing the sectional area of the reinforced reinforcing rib The reduction has become impossible to serve as a shearing reinforcement. Moreover, if the reduction of the cross-sectional area of the shear reinforcement rib is shortened, the spacing of the reinforcement reinforcement ribs is shortened and the number of shear reinforcement ribs is increased, which results in poor concrete filling and an increase in the number of parts.

Patent Document 2 (Japanese Laid-Open Patent Publication No. Hei No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei.

However, Patent Document 2 does not disclose a shear reinforcing rib that surrounds a joint of main ribs such as a connecting post.

Moreover, the reinforcing bar assembly used for walls, ceilings, floors or foundations extending in a plane is not disclosed.

Further, in the patent document 3 (Japanese Laid-Open Patent Publication No. 2006-104884), a steel bar having a flat cross-sectional shape and an increased circumference of a cross-sectional shape in order to improve adhesion to concrete is disclosed. This reinforcement is used in reinforced concrete structures, but it is not clearly disclosed how to use it.

The present invention has been made in order to solve the above problems, and provides a reinforcing steel assembly body which is used for a reinforced concrete structure having a concrete surface which is planarly expanded and which is parallel to each other and which is flat and parallel, and is disposed in and a plane in which the pair of concrete surfaces are parallel; a plurality of first ribs and a plurality of second ribs that are orthogonal to each other; and at least one of the first rib and the second rib includes a flat cross-sectional shape of the reinforcing bar, And the short axis direction is orthogonal to the above concrete surface.

According to the above configuration, the strength of the entire reinforced concrete structure can be sufficiently maintained, the thickness of the concrete protective layer can be ensured, and the thickness between the concrete faces can be reduced.

In another aspect of the invention, there is provided a steel bar assembly, characterized in that it is used for a concrete surface having a flat surface which is flatly expanded and parallel to each other and an opening extending through the concrete surfaces a concrete structure disposed on a plane parallel to the pair of concrete surfaces; and including a plurality of first ribs and a plurality of second ribs orthogonal to each other, and having a first rib and a second rib relative to the first rib and the second rib a plurality of diagonal ribs disposed obliquely and surrounding the opening; at least the diagonal ribs comprise a flat cross-sectional shape of the reinforcing bars, and the minor axis direction is orthogonal to the concrete surface.

According to the above configuration, in order to secure the thickness of the concrete protective layer, it is necessary to increase the thickness between the concrete surfaces by a portion corresponding to the reinforcing ribs, but by using the flat cross-sectional shape of the steel bars as the inclined ribs, the thickness can be suppressed from increasing. .

In still another aspect of the present invention, a steel bar assembly is provided, which is used in a linearly extending reinforced concrete structure and embedded in concrete; and is provided in parallel with each other and in the above-mentioned reinforced concrete structure. a plurality of main ribs extending linearly in the longitudinal direction of the body, and annular or spiral shear reinforcing ribs disposed along the concrete surface so as to be spaced apart from each other in the longitudinal direction of the main ribs; Further, the present invention includes a joint that connects the tubular shapes of the main ribs arranged on the straight line, and an additional shear reinforcing rib that is disposed along the concrete surface so as to surround the joint; and at least the additional shear reinforcing ribs are flat. The reinforcing bar of the cross-sectional shape is curved so that the opposite side faces are opposite to the inner side and the outer side in the short-axis direction, and the short-axis direction of the flat cross-sectional shape is orthogonal to the concrete surface.

In the above configuration, the additional shear reinforcing rib surrounding the joint is close to the concrete surface only to the extent corresponding to the thickness of the joint, but the shear reinforcing rib includes a flat cross-sectional shape of the steel bar, and the short-axis direction of the cross-sectional shape thereof Since it is orthogonal to the concrete surface, the thickness of the concrete protective layer can be ensured without reducing the sectional area of the additional shear reinforcing rib.

In still another aspect of the present invention, a reinforcing bar is provided, comprising: a base portion and a rib formed on an outer circumference of the base portion, the base portion having a flat cross-sectional shape, and a profile of the cross-sectional shape of the base portion having a short axis One pair of straight lines in the direction.

According to the cross-sectional shape, the reinforcing bars can be bent without being deformed on one plane. Further, according to the cross-sectional shape, the cross-sectional area of the reinforcing bar can be sufficiently ensured, and the dimension of the reinforcing bar in the short-axis direction can be minimized.

Preferably, the rib includes: a pair of longitudinal ribs extending in a longitudinal direction of the reinforcing bar and opposed to each other in a longitudinal direction of the flat cross-sectional shape; and transverse ribs formed between the longitudinal ribs and Extending in the direction of crossing the longitudinal ribs.

Thereby, the longitudinal rib does not become an obstacle, and the bending process can be performed more favorably.

According to the present invention, the thickness of the concrete protective layer in the reinforced concrete structure can be sufficiently ensured.

10‧‧‧Rebar

10a‧‧‧Welding Department

10b‧‧‧ corner

10c‧‧‧Hook (Employment Department)

10d‧‧‧ hook

10A‧‧‧ Ring steel bars (cutting and reinforcing bars)

10B‧‧‧ ring steel

10C‧‧‧ cut ribs

10D‧‧‧ Ring steel bars (additional shearing reinforcement bars)

10E‧‧‧Vertical ribs (1st rib)

10E'‧‧‧Additional vertical reinforcement

10F‧‧‧ horizontal ribs (2nd rib)

10F'‧‧‧Additional horizontal bars

10G‧‧‧ ribs

10H‧‧‧ horizontal ribs (1st rib)

10J‧‧‧ horizontal ribs (2nd rib)

10K‧‧‧ horizontal ribs (1st rib)

10L‧‧‧Vertical ribs (2nd rib)

10M‧‧‧Intermediate horizontal ribs

10P‧‧‧ horizontal ribs (1st rib)

10Q‧‧‧ horizontal ribs (2nd rib)

10R‧‧‧ horizontal ribs (1st rib)

10S‧‧‧Vertical ribs (2nd rib)

11‧‧‧ base

11a‧‧‧flat surface

11b‧‧‧Arc face

12‧‧‧ longitudinal ribs

13‧‧‧ transverse ribs

21‧‧‧ reinforced concrete columns

22‧‧‧ concrete

22a‧‧‧Concrete surface

23‧‧‧ Rebar combination

24‧‧‧ main tendons

25‧‧‧ intermediate main tendons

31‧‧‧Reinforced concrete beams

32‧‧‧ concrete

32a‧‧‧Concrete surface

33‧‧‧ Rebar combination

34‧‧‧ main tendons

35‧‧‧Connectors

36‧‧‧ Ring rebar

41‧‧‧ reinforced concrete wall

41a‧‧‧ Opening

42‧‧‧ concrete

42a‧‧‧Concrete surface

43‧‧‧Rebar combination

50‧‧‧Reinforced concrete mat foundation

50A‧‧‧Basic Department

50B‧‧‧立起部

51‧‧‧ concrete

51a‧‧‧ horizontal plane

52‧‧‧Base side reinforcement combination

53‧‧‧ concrete

53a‧‧‧Vertical

54‧‧‧Rising side reinforcement joint

60‧‧‧ reinforced concrete foundation

60A‧‧‧ horizontal board

60B‧‧‧Outdoor riser

60C‧‧‧The inside of the house

61‧‧‧ concrete

61a‧‧‧flat surface

62‧‧‧Rebar combination

63‧‧‧ concrete

63a‧‧‧Vertical

64‧‧‧Rebar combination

65‧‧‧ concrete

66‧‧‧Rebar combination

100‧‧‧ Ring rebar

100b‧‧‧ corner

104‧‧‧ main tendons

GL‧‧‧ ground

Lx‧‧‧ size

Ly‧‧‧ size

T‧‧‧ protective layer thickness

X‧‧‧ short axis

Y‧‧‧ long axis

Fig. 1A is a cross-sectional view showing a reinforcing bar of a flat cross-sectional shape used in all of the embodiments.

Figure 1B is a side view of the steel bar.

Figure 1C is a plan view of the steel bar.

Fig. 2 is a longitudinal sectional view showing a reinforced concrete column according to a first embodiment of the present invention, and the flat cross-sectional shape of the reinforcing bar is used as a ring reinforcing bar.

Figure 3 is a cross-sectional view of the column.

Fig. 4A is an enlarged cross-sectional view showing the main part of Fig. 2.

Fig. 4B is an enlarged cross-sectional view showing the main part of Fig. 3.

Fig. 5 is a cross-sectional view showing a reinforced concrete column according to a second embodiment of the present invention.

Fig. 6 is a cross-sectional view showing a reinforced concrete column according to a third embodiment of the present invention.

Fig. 7 is a longitudinal sectional view showing a reinforced concrete beam according to a fourth embodiment of the present invention.

Figure 8 is an enlarged cross-sectional view showing the arrow line A-A of Figure 7.

Fig. 9 is a longitudinal sectional view showing a reinforced concrete wall according to a fifth embodiment of the present invention.

Fig. 10 is a front view showing the reinforced concrete wall constituting the sixth embodiment of the present invention with the concrete omitted.

Fig. 11 is a longitudinal sectional view showing the wall of the sixth embodiment.

Fig. 12 is a cross-sectional view showing a mat foundation made of a reinforced concrete according to a seventh embodiment of the present invention.

Fig. 13 is a cross-sectional view showing a concrete foundation made of a reinforced concrete according to an eighth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1A to 1C show the reinforcing bars 10 used in all of the embodiments. The reinforcing bar 10 is formed by rolling in the same manner as a general bamboo reinforcing bar, and includes a base portion 11 formed on the outer periphery of the base portion 11 and continuously extending in the longitudinal direction of the reinforcing bar 10, a pair of longitudinal ribs 12, and a base portion. The outer ribs 13 are formed at equal intervals in the longitudinal direction of the reinforcing bar 10 at the outer circumference. The lateral ribs 13 extend between the pair of longitudinal ribs 12 in a direction intersecting the longitudinal direction of the reinforcing bar 10 and the longitudinal ribs 12 (in the direction orthogonal or obliquely intersecting as shown).

The steel bar 10 described above has a flat cross-sectional shape unlike a general bamboo bar. In the cross-sectional shape, the short axis is represented by X and the long axis is represented by Y. In the cross-sectional shape of the reinforcing bar 10, the ratio of the dimension Lx in the short-axis X direction to the dimension Ly in the long-axis Y direction is 1.0: 1.2 to 1.0: 3.0, more preferably 1.0: 1.5 to 1.0: 2.5. In the present embodiment, it is about 1:2. to In Figs. 1A to 1C, the above ratio is slightly exaggerated.

In the present embodiment, the cross-sectional shape of the reinforcing bar 10 is an oblong shape. As will be described in detail, the base portion 11 includes an abutting flat surface 11a parallel to each other and an elliptical shape connecting one of the flat surfaces 11a to the circular arc surface 11b. The pair of flat surfaces 11a are opposed to each other in the short axis X direction, and the pair of circular arc surfaces 11b are opposed to each other in the long axis Y direction.

The pair of flat faces 11a provide a pair of straight portions in the outline of the cross-sectional shape of the base portion 11.

The pair of vertical ribs 12 are respectively formed at the center of one of the pair of circular arc faces 11b of the base portion 11, and are spaced apart in the Y-axis direction.

The lateral rib 13 includes a straight portion having a uniform height extending along the flat surface 11a of the base portion 11, and a curved portion connected to the straight portion and extending along the circular arc surface 11b, the end of the curved portion and the longitudinal reinforcing portion 12 Connected.

Next, various embodiments of the reinforcing bar assembly including the above-described reinforcing bar 10 and the reinforced concrete structure in which the reinforcing bar assembly is incorporated will be described. In the above embodiments, the reinforcing ribs using the above-described reinforcing bars 10 are indicated by adding capital letters to the numeral 10.

2 to 4 show a reinforced concrete column 21 (a reinforced concrete structure extending linearly) as a first embodiment of the present invention. The column 21 includes a concrete 22 having a quadrangular cross section and a cage-like reinforcing steel assembly 23 extending in a straight line embedded in the concrete 22. As is well known, the column 21 is obtained by pouring concrete 22 into a space in a frame (not shown) surrounding the cross-section of the reinforcing bar assembly 23 at a factory or building site.

The reinforcing bar assembly 23 includes four vertical main ribs 24 which are disposed at right angles of a rectangular shape of a quadrangular shape of the reinforcing bar assembly 23, and a plurality of vertical main ribs 24 which are arranged at substantially equal intervals along the longitudinal direction of the main ribs 24 Ring steel 10A (cutting and reinforcing ribs).

For the main rib 24, a general rib reinforcement having a longitudinal rib and a transverse rib may be used, or a reinforcing rib (thread rebar) having a threaded joint may be used.

The above-mentioned ring reinforcing bar 10A is, for example, referred to as a welded closed ring reinforcing bar, by means of a drawing The straight steel bar 10 of the flat cross-sectional shape shown in FIG. 1C is bent into a quadrangular planar shape, and is obtained by welding both ends thereof. In Fig. 3, the welded portion is indicated by reference numeral 10a, and the bent corner portion is indicated by reference numeral 10b. The above-mentioned ring reinforcing bars 10A are horizontally arranged (disposed so as to intersect the main ribs 24 at right angles). The four corner portions 10b of the ring reinforcing bar 10A are erected in such a manner as to be in contact with the main rib 24 and surrounding the outer side thereof. As a result, the ring reinforcing bar 10A surrounds the four main ribs 24 and is located at the outermost side of the reinforcing bar assembly 3. Further, the ring reinforcing bar 10A and the main rib 24 are connected by a thin metal wire (not shown).

The concrete 22 has a quadrangular cross-sectional shape constituting a shape similar to the planar shape of the reinforcing bar assembly 23, and has four flat concrete faces 22a parallel to the respective sides of the ring reinforcing bar 10A. The distance between the outer side faces of the four side portions of the above-mentioned ring reinforcing bar 10A and the concrete face 22a becomes the protective layer thickness T of the concrete 22.

As shown in FIG. 4A and FIG. 4B, when the ring-shaped reinforcing bar 10A is formed, the reinforcing bar 10 is bent such that one of the pair of flat faces 11a and 11a in the short-axis X direction is formed inside and outside. Corner 10b. Since the thickness of the bending direction is reduced in this way, the bending requires only a small load, is easy to process, and can also reduce the radius of curvature thereof. In particular, in the present embodiment, the pair of faces 11a and 11a facing each other in the short-axis X direction is formed flat (because the straight line portion in the short-axis X direction is present in the outline of the cross-sectional shape), The reinforcing bar 10 is bent without deformation, so that the reinforcing bar 10A disposed on the same plane can be obtained.

By bending the reinforcing bar 10 so that the opposite faces 11a, 11a of the pair in the short axis X direction are outward and inner as described above, the short axis X direction of the cross-sectional shape of each side of the ring reinforcing bar 10A is made of concrete. The faces 22a are orthogonal. As a result, the size Lx of the ring reinforcing bar 10A in the direction orthogonal to the concrete surface 22a can be made smaller than that of the previously used reinforcing bar having the same cross-sectional area as the substantially circular cross-sectional area, so that the thickness T of the protective layer of the concrete can be increased. This is equivalent to the reduction in size.

If viewed from another point of view, the thickness of the protective layer can be ensured on the one hand and The sectional area of the concrete 22 is reduced in accordance with the reduction in the size of the above-described ring reinforcing bar 10A.

From another point of view, the position of the main rib 24 can be placed in the outer direction (the direction away from the center of the column 21), so that the strength of the column 21 can be improved. This aspect will be described with reference to FIG. 4B. When the ring reinforcing bar 100 (indicated by an imaginary line in the figure) including the cross-section of the reinforcing bar is used as before, the dimension orthogonal to the concrete face 22a is larger, and the radius of curvature of the corner portion 100b is larger. Therefore, the position of the main rib 104 for ensuring the thickness T of the protective layer becomes a position indicated by an imaginary line. On the other hand, when the reinforcing bar 10 having a flat cross-sectional shape is used as the ring reinforcing bar 10A as in the present invention, the dimension orthogonal to the concrete surface 22a is small, and the radius of curvature of the corner portion 10b is also small. When the cross-sectional area of the concrete 22 is the same as the thickness T of the protective layer, the main rib 24 may be disposed more outward than the previous one.

If, from another point of view, the ring reinforcement 100 comprising the cross-section of the steel bar is used as before, the thickness of the concrete cover layer is reduced and the cross-sectional area of the concrete 22 is reduced or the main rib 104 is offset outward. However, it is necessary to reduce the diameter of the ring reinforcing bar 100, so that the sectional area of the ring reinforcing bar 100 is reduced. In order to compensate for the reduction in the sectional area of the ring reinforcing bar 100, it is necessary to increase the number of the ring reinforcing bars 100 and shorten the spacing of the reinforcing bars. On the other hand, in the present invention, when the sectional area of the concrete 22 is reduced or the main rib 24 is displaced outward, the thickness of the concrete protective layer can be ensured without reducing the sectional area of the reinforcing steel 10A. As a result, the distance between the reinforcing bars 10A and the reinforcing bars can be shortened, so that the filling property of the concrete can be prevented.

Hereinafter, another embodiment of the present invention will be described. In the above embodiments, the same components as those of the previous embodiments are denoted by the same reference numerals, and the detailed description thereof will be omitted.

In the column 21 of the second embodiment shown in FIG. 5, the ring reinforcing bar 10B is not welded to both end portions of the reinforcing bar 10, and is bent to form a hook portion 10c (stacking portion), and the hook portion 10c is hung on one of the hook portions 10c. The main ribs 24 are grown. Bending method of the corner portion 10b of the ring reinforcing bar 10B and the hook portion 10c and the first embodiment The shape is the same so that one of the opposing faces 11a and 11a in the short-axis X direction is bent outward and inside.

In the column 21 of the third embodiment shown in FIG. 6, in addition to the main rib 24 located at the corner of the planar shape of the ridge structure 23, the intermediate main rib 25 is disposed at the side of the planar shape, and The intermediate main ribs 25 are provided with a shear reinforcing rib 10C. That is, a hook portion 10d is formed at both end portions of the shear reinforcing rib 10C, and the hook portion 10d is hung on the intermediate main rib 25. Similarly to the ring reinforcing bar 10A, the shear reinforcing rib 10C includes a flat cross-sectional shape of the reinforcing bar 10, and is curved so that the surface facing the ridge in the short-axis X direction of the cross-sectional shape of the reinforcing bar 10 becomes the outer side and the inner side. This forms the above-described hook portion 10d. Therefore, the shear reinforcing rib 10C does not protrude further outward than the above-described ring reinforcing bar 10A, so that the thickness of the protective layer of the concrete 22 is not reduced.

In the fourth embodiment shown in Figs. 7 and 8, the present invention is applied to a reinforced concrete beam 31 (a reinforced concrete structure) which is linearly extended horizontally. The beam 31 is constructed by joining the reinforcing bar assemblies 33 having a basic structure similar to the reinforcing bar assembly 23 of the above-described column 21, and being embedded in the concrete 32 having a cross-sectional quadrangular shape. The connection of the reinforcing bar assembly 33 is obtained by inserting and connecting the end portions of the two main ribs 34 arranged on the straight line to the joint 35. If the main rib 34 is a threaded rebar, the joint 35 has a female thread on the inner circumference, and the end portion of the main rib 34 is joined by screwing.

The ring reinforcing bar 36 surrounding the main rib 34 has a circular cross section in the same manner as a normal reinforcing bar. In order to maintain the strength of the beam 31, it is necessary to erect the ring reinforcing bar 10D (additional shear reinforcing rib) on the joint 35. Since the diameter of the joint 35 is larger than the diameter of the main rib 34, if the steel bar having a substantially circular cross section is used as the ring reinforcing bar 10D in the same manner as the ring reinforcing bar 36, the thickness of the concrete protective layer between the ring reinforcing bar 10D and the concrete face 32a is reduced. T. Therefore, in the present embodiment, the reinforcing bar 10 of the flat cross section shown in Fig. 1 is used as the ring reinforcing bar 10D. Similarly to the previous embodiment, the reinforcing bar 10 is orthogonal to the concrete surface 32a so that the opposite side 11a, 11a becomes the outer side and the inner side in the short axis X direction. The way it bends. As a result, a reduction in the thickness T of the protective layer can be avoided.

From another point of view, the thickness T of the protective layer can be ensured without reducing the sectional area of the ring-shaped reinforcing bar 10D, and the reduction of the cross-sectional area can be compensated for by reducing the distance between the reinforcing bars 10D and reducing the spacing of the reinforcing bars. Specifically, the ring reinforcing bars 10D can be made to have the same degree of distance from the ring reinforcing bars 36.

In the fourth embodiment, the ring reinforcing bars 36 may be formed of the flat cross-sectional reinforcing bars 10.

The structure of the column of the first to third embodiments described above can also be applied to a beam that extends horizontally in a straight line.

Further, the structure of the beam of the fourth embodiment can be applied to the column.

The fifth embodiment shown in Fig. 9 is applied to the reinforced concrete wall 41 (planarly expanded reinforced concrete structure). This wall 41 is constructed by embedding two reinforcing steel assemblies 43 in the concrete 42. The concrete 42 has vertical faces 42a that are parallel to each other, and the two reinforcing bar assemblies 43 are disposed in parallel with the concrete faces 42a and disposed on two planes spaced apart in the thickness direction of the concrete 42.

Each of the reinforcing bar assemblies 43 is configured by connecting a vertical rib 10E (first rib) and a horizontal rib 10F (second rib) to each other at a cross portion thereof by a thin metal wire.

As the vertical rib 10E and the horizontal rib 10F, the flat cross-sectional reinforcing steel 10 shown in Fig. 1 is used. The reinforcing bar 10 is kept in a straight shape and is cut into a specific size without being bent. The short axis X direction of the cross-sectional shape of the reinforcing bar 10 is made orthogonal to the concrete surface 42a.

Thereby, the concrete protective layer thickness T can be ensured, and the concrete filling space between the reinforcing steel assemblies 43 can be sufficiently ensured, and the thickness of the wall 42 can be reduced. If, for another insight, the thickness of the wall 42 is not changed, the thickness T of the concrete protective layer is increased or the concrete filling space is increased.

In the sixth embodiment shown in Figs. 10 and 11, the present invention is applied to the reinforced concrete wall 41 in the same manner as in Fig. 9 . An opening 41a through which a pipe (not shown) or the like passes is formed in the wall 41, and the vertical rib 10E and the horizontal rib 10F of the reinforcing bar assembly are in a region corresponding to the opening 41a. The domain is removed. Furthermore, the opening 41a can also be an opening of a window or a door.

The additional vertical ribs 10E' are disposed on the right and left sides so as to surround the opening 41a, and the additional horizontal ribs 10F' are disposed on the upper and lower sides, and the four ribs 10G are disposed.

In the present embodiment, not only the vertical ribs 10E and the horizontal ribs 10F include the flat cross-sectional reinforcing bars 10, but the additional vertical ribs 10E', the horizontal ribs 10F', and the diagonal ribs 10G also include the flat cross-sectional reinforcing bars 10, and The short axis X direction is orthogonal to the concrete surface 2b.

By incorporating the above-mentioned diagonal rib 10G, the thickness of the concrete protective layer or the concrete filling space between the pair of reinforcing steel assemblies 43 is reduced, but by using the flat cross-sectional shape of the reinforcing steel 10, the reduction can be suppressed.

In the seventh embodiment shown in Fig. 12, the present invention is applied to a reinforced concrete floor foundation 50 (reinforced concrete structure). The mat foundation 50 extends slenderly along the wall of the house to support the house. The mat foundation 50 includes a base portion 50A buried in the floor GL and a rising portion 50B that rises vertically from the base portion 50A. In the present application, the base portion 50A and the rising portion 50B are also regarded as reinforced concrete structures, respectively.

In the base portion 50A, the base-side reinforcing bar assembly 52 embedded in the concrete 51 having a rectangular cross section is disposed on a horizontal surface, and includes two horizontal ribs 10H (first ribs) parallel to each other, and A plurality of horizontal ribs 10J (second ribs) which are disposed between the horizontal ribs 10H and orthogonally to the horizontal ribs 10H and are arranged at equal intervals along the horizontal ribs 10H constitute a ladder shape. The horizontal ribs 10H and 10J include the reinforcing bars 10 having a flat cross section, and are arranged such that the short axis X of the cross-sectional shape faces the vertical direction, that is, orthogonal to the horizontal planes 51a and 51a above and below the concrete 51.

In the rising portion 50B, the rising portion side reinforcing bar assembly 54 embedded in the concrete 53 having a rectangular cross section is disposed on a vertical surface (that is, a plane parallel to the left and right perpendicular faces 53a, 53a of the concrete 53). And including a plurality of horizontal ribs 10K (first ribs) which are parallel to each other, and a plurality of vertical ribs 10L (second ribs) which are disposed between the horizontal ribs 10K and arranged at equal intervals along the horizontal ribs 10K, And form a ladder shape. The lower end side reinforcing bar assembly 54 is fixed at the lower end It is positioned substantially at the center of the base side reinforcing bar assembly 52.

The horizontal rib 10K and the vertical rib 10L include a rebar 10 having a flat cross section, and the short axis X of the cross-sectional shape extends in the thickness direction of the concrete 53, that is, the manner orthogonal to the left and right vertical faces 53a, 53a of the concrete 53 Orientation.

Further, the rising portion side reinforcing bar assembly 54 of the present embodiment includes the intermediate horizontal rib 10M which is disposed in parallel with the two horizontal ribs 10K and disposed therebetween. The intermediate rib 10M has a smaller sectional area than the horizontal rib 10K. Therefore, as in the present embodiment, the cross-section flat steel bar 10 may be used in the same manner as the longitudinal rib 10K, or may have a circular cross section.

In the eighth embodiment shown in Fig. 13, the present invention is applied to a concrete foundation 60 (reinforced concrete structure) made of reinforced concrete. The raft foundation 50 includes a horizontal plate 60A, a raised outer portion 60B along the outer wall of the house, and a raised inner portion 60C along the wall of the house. In the present application, the horizontal plates 60A and the rising portions 60B and 60C are also regarded as reinforced concrete structures, respectively.

The horizontal plate 60A includes a horizontally expanded concrete 61 and a reinforcing bar assembly 62 which is formed in parallel with the flat surfaces 61a and 61a above and below the concrete 61 and embedded in the concrete 61. The reinforcing bar assembly 62 includes a plurality of horizontal ribs 10P (first ribs) parallel to each other and a plurality of horizontal ribs 10Q (second ribs) orthogonal to the horizontal ribs 10P to form a mesh shape. The first ribs 10P and 10Q include the reinforcing bars 10 having a flat cross section, and are aligned so as to extend orthogonally to the short axis X of the cross-sectional shape, that is, to be orthogonal to the horizontal planes 61a and 61a above and below the concrete 61.

In the above-described roof outer rising portion 60B, the reinforcing bar assembly 64 embedded in the concrete 63 having a rectangular cross section is disposed on a vertical surface which is formed in parallel with the flat vertical faces 63a and 63a of the right and left sides of the concrete 63. The plurality of vertical ribs 10R (first ribs) arranged in parallel and the plurality of vertical ribs 10S (second ribs) spanned between the horizontal ribs 10R and spaced apart at equal intervals along the horizontal ribs 10R. The horizontal ribs 10R and the vertical ribs 10S include a rebar 10 having a flat cross section, and the short axis X of the cross-sectional shape extends in the thickness direction of the concrete 63. That is, it is aligned so as to be orthogonal to the left and right perpendicular faces 63a, 63a of the concrete 63.

The horizontal rib 10S is bent at a lower end portion of the intersection portion between the horizontal plate 60A and the outdoor raised portion 60B. In other words, the pair of faces 11a and 11a facing each other in the short-axis direction of the reinforcing bar 10 of the flat cross section are bent outward and inward.

The house inner riser portion 60C is formed by a concrete 65 having a rectangular cross section and a vertical steel bar assembly 66 embedded in the concrete 65. Since the house inner rising portion 60C has the same structure as the rising portion 50B shown in FIG. 12, the same reference numerals will be given to the reinforcing bars used, and the description thereof will be omitted.

The present invention is not limited to the above embodiments, and various forms can be employed. For example, the flat cross-sectional shape of the steel bar may also be a shape in which the reinforced bar is flattened.

The cross-sectional shape of the flat cross-sectional shape of the steel bar may also be an ellipse.

Ring steel bars (shear reinforcement bars) used in reinforced concrete structures such as columns or beams may also be spiral ring bars. In this case, each of the wound portions is disposed at an interval in the longitudinal direction of the reinforced concrete structure.

The section of the reinforced concrete column can be either polygonal or circular. In the case of a circle, the ring reinforcing bar is curved in a circular shape in a planar shape.

In the embodiment of FIGS. 9 to 13, only one of the first rib and the second rib may be formed of a flat cross-sectional reinforcing bar.

In the embodiment of Figs. 10 and 11, only the diagonal ribs may be formed of a flat cross-sectional steel bar.

The structure of the reinforced concrete structure shown in Figs. 9 to 11 can also be applied to a ceiling or a floor.

[Industrial availability]

The invention can be applied to reinforced concrete structures such as columns, beams, walls, ceilings, floors, foundations, and the like.

10E‧‧‧Vertical ribs (1st rib)

10F‧‧‧ horizontal ribs (2nd rib)

41‧‧‧ reinforced concrete wall

42‧‧‧ concrete

42a‧‧‧Concrete surface

43‧‧‧Rebar combination

T‧‧‧ protective layer thickness

Claims (7)

A steel bar assembly, which is used for a reinforced concrete structure having a concrete surface that is planarly expanded and parallel to one another, and disposed on a plane parallel to the pair of concrete faces; a plurality of first ribs and a plurality of second ribs orthogonal to each other; at least one of the first rib and the second rib includes a flat cross-sectional shape of the reinforcing bar, and the minor axis direction is orthogonal to the concrete surface. A reinforcing steel assembly characterized in that it is used for a reinforced concrete structure having a concrete surface that is planarly expanded and parallel to one another and that is open to the opening between the concrete surfaces, and is disposed on the pair a plane parallel to the concrete surface; and a plurality of first ribs and a plurality of second ribs orthogonal to each other, and a plurality of roots arranged to be inclined with respect to the first ribs and the second ribs and surrounding the openings a rib; at least the rib has a flat cross-sectional shape of the reinforcing bar, and the minor axis direction is orthogonal to the concrete surface. A steel bar assembly, which is used for a linearly extending reinforced concrete structure and embedded in concrete; and has a plurality of main ribs which are parallel to each other and linearly extend in the longitudinal direction of the reinforced concrete structure And an annular or spiral shearing reinforcing rib disposed along the concrete surface so as to be spaced apart from each other in the longitudinal direction of the main ribs; and further comprising the main ribs connected to each other on the straight line a tubular shape joint and an additional shear reinforcement rib disposed along the concrete surface so as to surround the joint; At least the additional shear reinforcing ribs include a flat cross-sectional shape of a steel bar which is bent such that a pair of faces in the short axis direction are opposite to the inner side and the outer side, and the short axis of the flat cross-sectional shape The direction is orthogonal to the above concrete surface. A reinforced concrete structure obtained by embedding the reinforcing bar assembly according to any one of claims 1 to 3 in the above concrete. A reinforcing bar characterized by having a base portion and a rib formed on an outer circumference of the base portion, the base portion having a flat cross-sectional shape, and a profile of a cross-sectional shape of the base portion having a pair of straight portions in a short-axis direction. The reinforcing bar of claim 5, wherein the rib comprises: a pair of longitudinal ribs extending in a longitudinal direction of the reinforcing bar and opposed to each other in a longitudinal direction of the flat cross-sectional shape; and a transverse rib formed in the rib The longitudinal ribs extend between the longitudinal ribs and the longitudinal ribs. A shear reinforcing rib, characterized in that it consists of a steel bar as claimed in claim 5 or 6, and is disposed between a plurality of main ribs extending parallel to each other and extending linearly or in such a manner as to surround the main ribs; The surface is curved so as to face the inner side and the outer side in the short axis direction of the cross-sectional shape.